1101212220021 has 64 divisors (see below), whose sum is σ = 1628257075200. Its totient is φ = 659005341696.

The previous prime is 1101212220019. The next prime is 1101212220029. The reversal of 1101212220021 is 1200222121011.

It is not a de Polignac number, because 1101212220021 - 2¹ = 1101212220019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101212220029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 127909765 + ... + 127918373.

It is an arithmetic number, because the mean of its divisors is an integer number (25441516800).

Almost surely, 2^{1101212220021} is an apocalyptic number.

It is an amenable number.

1101212220021 is a deficient number, since it is larger than the sum of its proper divisors (527044855179).

1101212220021 is a wasteful number, since it uses less digits than its factorization.

1101212220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9998.

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

Adding to 1101212220021 its reverse (1200222121011), we get a palindrome (2301434341032).

The spelling of 1101212220021 in words is "one trillion, one hundred one billion, two hundred twelve million, two hundred twenty thousand, twenty-one".