21010010212 has 24 divisors (see below), whose sum is σ = 37465243200. Its totient is φ = 10306365216.

The previous prime is 21010010179. The next prime is 21010010213. The reversal of 21010010212 is 21201001012.

It is not an unprimeable number, because it can be changed into a prime (21010010213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30214 + ... + 207202.

It is an arithmetic number, because the mean of its divisors is an integer number (1561051800).

Almost surely, 2^21010010212 is an apocalyptic number.

It is an amenable number.

21010010212 is a deficient number, since it is larger than the sum of its proper divisors (16455232988).

21010010212 is a wasteful number, since it uses less digits than its factorization.

21010010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177555 (or 177553 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21010010212 its reverse (21201001012), we get a palindrome (42211011224).

The spelling of 21010010212 in words is "twenty-one billion, ten million, ten thousand, two hundred twelve".