30211111021 has 32 divisors (see below), whose sum is σ = 38633817600. Its totient is φ = 22977803520.

The previous prime is 30211111001. The next prime is 30211111057. The reversal of 30211111021 is 12011111203.

It is a happy number.

It is not a de Polignac number, because 30211111021 - 2²¹ = 30209013869 is a prime.

It is a super-2 number, since 2×30211111021² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 30211110992 and 30211111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30211111001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579336 + ... + 629326.

It is an arithmetic number, because the mean of its divisors is an integer number (1207306800).

Almost surely, 2^30211111021 is an apocalyptic number.

It is an amenable number.

30211111021 is a deficient number, since it is larger than the sum of its proper divisors (8422706579).

30211111021 is a wasteful number, since it uses less digits than its factorization.

30211111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50269.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 30211111021 its reverse (12011111203), we get a palindrome (42222222224).

The spelling of 30211111021 in words is "thirty billion, two hundred eleven million, one hundred eleven thousand, twenty-one".