1121001111021 has 16 divisors (see below), whose sum is σ = 1630643151168. Its totient is φ = 679354579200.

The previous prime is 1121001111011. The next prime is 1121001111023. The reversal of 1121001111021 is 1201111001211.

It is not a de Polignac number, because 1121001111021 - 2³⁴ = 1103821241837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121001110988 and 1121001111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121001111023) 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, 427420 + ... + 1557141.

It is an arithmetic number, because the mean of its divisors is an integer number (101915196948).

Almost surely, 2^{1121001111021} is an apocalyptic number.

1121001111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121001111021 is a deficient number, since it is larger than the sum of its proper divisors (509642040147).

1121001111021 is a wasteful number, since it uses less digits than its factorization.

1121001111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001692.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1121001111021 its reverse (1201111001211), we get a palindrome (2322112112232).

The spelling of 1121001111021 in words is "one trillion, one hundred twenty-one billion, one million, one hundred eleven thousand, twenty-one".