21020123101002 has 16 divisors (see below), whose sum is σ = 42065019496512. Its totient is φ = 7002578817920.

The previous prime is 21020123100997. The next prime is 21020123101009. The reversal of 21020123101002 is 20010132102012.

It is not an unprimeable number, because it can be changed into a prime (21020123101009) 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, 1032209574 + ... + 1032229937.

It is an arithmetic number, because the mean of its divisors is an integer number (2629063718532).

Almost surely, 2^{21020123101002} is an apocalyptic number.

21020123101002 is an abundant number, since it is smaller than the sum of its proper divisors (21044896395510).

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

21020123101002 is a wasteful number, since it uses less digits than its factorization.

21020123101002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064441213.

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

Adding to 21020123101002 its reverse (20010132102012), we get a palindrome (41030255203014).

The spelling of 21020123101002 in words is "twenty-one trillion, twenty billion, one hundred twenty-three million, one hundred one thousand, two".