21101202111002 has 32 divisors (see below), whose sum is σ = 35490362002704. Its totient is φ = 9345717388800.

The previous prime is 21101202110993. The next prime is 21101202111091. The reversal of 21101202111002 is 20011120210112.

It can be written as a sum of positive squares in 8 ways, for example, as 2051285637361 + 19049916473641 = 1432231^2 + 4364621^2 .

It is a super-2 number, since 2×21101202111002² (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 15 ways as a sum of consecutive naturals, for example, 162187013 + ... + 162317064.

Almost surely, 2^{21101202111002} is an apocalyptic number.

21101202111002 is a deficient number, since it is larger than the sum of its proper divisors (14389159891702).

21101202111002 is a wasteful number, since it uses less digits than its factorization.

21101202111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324504194.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101202111002 its reverse (20011120210112), we get a palindrome (41112322321114).

The spelling of 21101202111002 in words is "twenty-one trillion, one hundred one billion, two hundred two million, one hundred eleven thousand, two".