1020133121 has 4 divisors (see below), whose sum is σ = 1165866432. Its totient is φ = 874399812.

The previous prime is 1020133061. The next prime is 1020133129. The reversal of 1020133121 is 1213310201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020133121 - 2¹⁸ = 1019870977 is a prime.

It is a super-2 number, since 2×1020133121² = 2081343169122401282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020133096 and 1020133105.

It is not an unprimeable number, because it can be changed into a prime (1020133129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72866645 + ... + 72866658.

It is an arithmetic number, because the mean of its divisors is an integer number (291466608).

Almost surely, 2^1020133121 is an apocalyptic number.

It is an amenable number.

1020133121 is a deficient number, since it is larger than the sum of its proper divisors (145733311).

1020133121 is an equidigital number, since it uses as much as digits as its factorization.

1020133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145733310.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1020133121 is about 31939.5228674443. The cubic root of 1020133121 is about 1006.6664993616. Note that the first 3 decimals are identical.

Adding to 1020133121 its reverse (1213310201), we get a palindrome (2233443322).

The spelling of 1020133121 in words is "one billion, twenty million, one hundred thirty-three thousand, one hundred twenty-one".