21011121012002 has 16 divisors (see below), whose sum is σ = 34505956539072. Its totient is φ = 9516031174320.

The previous prime is 21011121011897. The next prime is 21011121012031. The reversal of 21011121012002 is 20021012111012.

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, 1723912598 + ... + 1723924785.

It is an arithmetic number, because the mean of its divisors is an integer number (2156622283692).

Almost surely, 2^{21011121012002} is an apocalyptic number.

21011121012002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011121012002 is a deficient number, since it is larger than the sum of its proper divisors (13494835527070).

21011121012002 is a wasteful number, since it uses less digits than its factorization.

21011121012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447837673.

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

Adding to 21011121012002 its reverse (20021012111012), we get a palindrome (41032133123014).

The spelling of 21011121012002 in words is "twenty-one trillion, eleven billion, one hundred twenty-one million, twelve thousand, two".