20101021010 has 32 divisors (see below), whose sum is σ = 41760099072. Its totient is φ = 6823540800.

The previous prime is 20101021007. The next prime is 20101021019. The reversal of 20101021010 is 1012010102.

It is a super-2 number, since 2×20101021010² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20101021019) 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, 1414502 + ... + 1428641.

It is an arithmetic number, because the mean of its divisors is an integer number (1305003096).

Almost surely, 2^20101021010 is an apocalyptic number.

20101021010 is an abundant number, since it is smaller than the sum of its proper divisors (21659078062).

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

20101021010 is a wasteful number, since it uses less digits than its factorization.

20101021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843258.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20101021010 its reverse (1012010102), we get a palindrome (21113031112).

The spelling of 20101021010 in words is "twenty billion, one hundred one million, twenty-one thousand, ten".