20021212011010 has 24 divisors (see below), whose sum is σ = 41921966375100. Its totient is φ = 6864415546464.

The previous prime is 20021212010959. The next prime is 20021212011041. The reversal of 20021212011010 is 1011021212002.

It can be written as a sum of positive squares in 2 ways, for example, as 18144950376721 + 1876261634289 = 4259689^2 + 1369767^2 .

It is a super-2 number, since 2×20021212011010² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20429807685 + ... + 20429808664.

Almost surely, 2^{20021212011010} is an apocalyptic number.

20021212011010 is an abundant number, since it is smaller than the sum of its proper divisors (21900754364090).

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

20021212011010 is a wasteful number, since it uses less digits than its factorization.

20021212011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40859616370 (or 40859616363 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021212011010 its reverse (1011021212002), we get a palindrome (21032233223012).

The spelling of 20021212011010 in words is "twenty trillion, twenty-one billion, two hundred twelve million, eleven thousand, ten".