30212123100 has 72 divisors (see below), whose sum is σ = 88611255600. Its totient is φ = 7946196480.

The previous prime is 30212123099. The next prime is 30212123101. The reversal of 30212123100 is 132121203.

It is an interprime number because it is at equal distance from previous prime (30212123099) and next prime (30212123101).

It is a super-2 number, since 2×30212123100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30212123100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30212123101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 667875 + ... + 711674.

Almost surely, 2^30212123100 is an apocalyptic number.

30212123100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30212123100 is an abundant number, since it is smaller than the sum of its proper divisors (58399132500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30212123100 is a wasteful number, since it uses less digits than its factorization.

30212123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379639 (or 1379632 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30212123100 its reverse (132121203), we get a palindrome (30344244303).

It can be divided in two parts, 302121 and 23100, that added together give a triangular number (325221 = T₈₀₆).

The spelling of 30212123100 in words is "thirty billion, two hundred twelve million, one hundred twenty-three thousand, one hundred".