11020112121 has 16 divisors (see below), whose sum is σ = 14895492480. Its totient is φ = 7246291200.

The previous prime is 11020112101. The next prime is 11020112123. The reversal of 11020112121 is 12121102011.

It is not a de Polignac number, because 11020112121 - 2²² = 11015917817 is a prime.

It is a super-2 number, since 2×11020112121² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11020112097 and 11020112106.

It is not an unprimeable number, because it can be changed into a prime (11020112123) 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, 10545 + ... + 148833.

It is an arithmetic number, because the mean of its divisors is an integer number (930968280).

Almost surely, 2^11020112121 is an apocalyptic number.

It is an amenable number.

11020112121 is a deficient number, since it is larger than the sum of its proper divisors (3875380359).

11020112121 is a wasteful number, since it uses less digits than its factorization.

11020112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138656.

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

Adding to 11020112121 its reverse (12121102011), we get a palindrome (23141214132).

The spelling of 11020112121 in words is "eleven billion, twenty million, one hundred twelve thousand, one hundred twenty-one".