212001221130 has 32 divisors (see below), whose sum is σ = 511849666944. Its totient is φ = 56195132736.

The previous prime is 212001221123. The next prime is 212001221137. The reversal of 212001221130 is 31122100212.

It is an interprime number because it is at equal distance from previous prime (212001221123) and next prime (212001221137).

It is a super-2 number, since 2×212001221130² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (212001221137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21152797 + ... + 21162816.

It is an arithmetic number, because the mean of its divisors is an integer number (15995302092).

Almost surely, 2^212001221130 is an apocalyptic number.

212001221130 is an abundant number, since it is smaller than the sum of its proper divisors (299848445814).

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

212001221130 is a wasteful number, since it uses less digits than its factorization.

212001221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42315790.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212001221130 its reverse (31122100212), we get a palindrome (243123321342).

The spelling of 212001221130 in words is "two hundred twelve billion, one million, two hundred twenty-one thousand, one hundred thirty".