1201021211001 has 16 divisors (see below), whose sum is σ = 1602637826688. Its totient is φ = 800042880000.

The previous prime is 1201021210999. The next prime is 1201021211063. The reversal of 1201021211001 is 1001121201021.

It is not a de Polignac number, because 1201021211001 - 2¹ = 1201021210999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201021211501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33204276 + ... + 33240426.

It is an arithmetic number, because the mean of its divisors is an integer number (100164864168).

Almost surely, 2^{1201021211001} is an apocalyptic number.

It is an amenable number.

1201021211001 is a deficient number, since it is larger than the sum of its proper divisors (401616615687).

1201021211001 is a wasteful number, since it uses less digits than its factorization.

1201021211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44672.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201021211001 its reverse (1001121201021), we get a palindrome (2202142412022).

The spelling of 1201021211001 in words is "one trillion, two hundred one billion, twenty-one million, two hundred eleven thousand, one".