1020511203231 has 16 divisors (see below), whose sum is σ = 1465512219360. Its totient is φ = 627937123200.

The previous prime is 1020511203203. The next prime is 1020511203253. The reversal of 1020511203231 is 1323021150201.

It is not a de Polignac number, because 1020511203231 - 2⁶ = 1020511203167 is a prime.

It is a super-2 number, since 2×1020511203231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020511203198 and 1020511203207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020511203631) 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, 1096920 + ... + 1801181.

It is an arithmetic number, because the mean of its divisors is an integer number (91594513710).

Almost surely, 2^{1020511203231} is an apocalyptic number.

1020511203231 is a deficient number, since it is larger than the sum of its proper divisors (445001016129).

1020511203231 is a wasteful number, since it uses less digits than its factorization.

1020511203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907146.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 1020511203231 its reverse (1323021150201), we get a palindrome (2343532353432).

The spelling of 1020511203231 in words is "one trillion, twenty billion, five hundred eleven million, two hundred three thousand, two hundred thirty-one".