2120021221101 has 32 divisors (see below), whose sum is σ = 3503966231808. Its totient is φ = 1112370216960.

The previous prime is 2120021221093. The next prime is 2120021221103. The reversal of 2120021221101 is 1011221200212.

It is not a de Polignac number, because 2120021221101 - 2³ = 2120021221093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120021221103) 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, 72405300 + ... + 72434573.

It is an arithmetic number, because the mean of its divisors is an integer number (109498944744).

Almost surely, 2^{2120021221101} is an apocalyptic number.

2120021221101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2120021221101 is a deficient number, since it is larger than the sum of its proper divisors (1383945010707).

2120021221101 is a wasteful number, since it uses less digits than its factorization.

2120021221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144839941.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2120021221101 its reverse (1011221200212), we get a palindrome (3131242421313).

The spelling of 2120021221101 in words is "two trillion, one hundred twenty billion, twenty-one million, two hundred twenty-one thousand, one hundred one".