1211102020001 has 24 divisors (see below), whose sum is σ = 1285410484800. Its totient is φ = 1140893794656.

The previous prime is 1211102019943. The next prime is 1211102020031. The reversal of 1211102020001 is 1000202011121.

It is not a de Polignac number, because 1211102020001 - 2¹⁰ = 1211102018977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211102020031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145613495 + ... + 145621811.

It is an arithmetic number, because the mean of its divisors is an integer number (53558770200).

Almost surely, 2^{1211102020001} is an apocalyptic number.

It is an amenable number.

1211102020001 is a deficient number, since it is larger than the sum of its proper divisors (74308464799).

1211102020001 is a wasteful number, since it uses less digits than its factorization.

1211102020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10581 (or 10562 counting only the distinct ones).

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

Adding to 1211102020001 its reverse (1000202011121), we get a palindrome (2211304031122).

The spelling of 1211102020001 in words is "one trillion, two hundred eleven billion, one hundred two million, twenty thousand, one".