21111020122002 has 16 divisors (see below), whose sum is σ = 42914204838912. Its totient is φ = 6921645941520.

The previous prime is 21111020121943. The next prime is 21111020122051. The reversal of 21111020122002 is 20022102011112.

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, 28840191058 + ... + 28840191789.

It is an arithmetic number, because the mean of its divisors is an integer number (2682137802432).

Almost surely, 2^{21111020122002} is an apocalyptic number.

21111020122002 is an abundant number, since it is smaller than the sum of its proper divisors (21803184716910).

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

21111020122002 is a wasteful number, since it uses less digits than its factorization.

21111020122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57680382913.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21111020122002 its reverse (20022102011112), we get a palindrome (41133122133114).

The spelling of 21111020122002 in words is "twenty-one trillion, one hundred eleven billion, twenty million, one hundred twenty-two thousand, two".