21012022010 has 16 divisors (see below), whose sum is σ = 43224731136. Its totient is φ = 7204121808.

The previous prime is 21012021983. The next prime is 21012022027. The reversal of 21012022010 is 1022021012.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21012021982 and 21012022000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150085802 + ... + 150085941.

It is an arithmetic number, because the mean of its divisors is an integer number (2701545696).

Almost surely, 2^21012022010 is an apocalyptic number.

21012022010 is an abundant number, since it is smaller than the sum of its proper divisors (22212709126).

21012022010 is a wasteful number, since it uses less digits than its factorization.

21012022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300171757.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21012022010 its reverse (1022021012), we get a palindrome (22034043022).

The spelling of 21012022010 in words is "twenty-one billion, twelve million, twenty-two thousand, ten".