1102001210021 has 4 divisors (see below), whose sum is σ = 1102091159532. Its totient is φ = 1101911260512.

The previous prime is 1102001210017. The next prime is 1102001210041. The reversal of 1102001210021 is 1200121002011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 284984077921 + 817017132100 = 533839^2 + 903890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102001210021 - 2² = 1102001210017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102001209984 and 1102001210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102001210041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44956376 + ... + 44980881.

It is an arithmetic number, because the mean of its divisors is an integer number (275522789883).

Almost surely, 2^{1102001210021} is an apocalyptic number.

It is an amenable number.

1102001210021 is a deficient number, since it is larger than the sum of its proper divisors (89949511).

1102001210021 is an equidigital number, since it uses as much as digits as its factorization.

1102001210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89949510.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1102001210021 its reverse (1200121002011), we get a palindrome (2302122212032).

The spelling of 1102001210021 in words is "one trillion, one hundred two billion, one million, two hundred ten thousand, twenty-one".