1220100211001 has 32 divisors (see below), whose sum is σ = 1519136640000. Its totient is φ = 956131912512.

The previous prime is 1220100210977. The next prime is 1220100211019. The reversal of 1220100211001 is 1001120010221.

It is not a de Polignac number, because 1220100211001 - 2³⁴ = 1202920341817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220100211061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8020490 + ... + 8171196.

It is an arithmetic number, because the mean of its divisors is an integer number (47473020000).

Almost surely, 2^{1220100211001} is an apocalyptic number.

It is an amenable number.

1220100211001 is a deficient number, since it is larger than the sum of its proper divisors (299036428999).

1220100211001 is a wasteful number, since it uses less digits than its factorization.

1220100211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152861.

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

Adding to 1220100211001 its reverse (1001120010221), we get a palindrome (2221220221222).

The spelling of 1220100211001 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred eleven thousand, one".