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11372820421 is a prime number
BaseRepresentation
bin10101001011101111…
…10111011111000101
31002100120222010201011
422211313313133011
5141242420223141
65120303002221
7551554243564
oct124567673705
932316863634
1011372820421
11490672a346
122254899371
1310c3240951
1479c5dbbdb
15468684881
hex2a5df77c5

11372820421 has 2 divisors, whose sum is σ = 11372820422. Its totient is φ = 11372820420.

The previous prime is 11372820391. The next prime is 11372820457. The reversal of 11372820421 is 12402827311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7497135396 + 3875685025 = 86586^2 + 62255^2 .

It is a cyclic number.

It is not a de Polignac number, because 11372820421 - 221 = 11370723269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11372820461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5686410210 + 5686410211.

It is an arithmetic number, because the mean of its divisors is an integer number (5686410211).

Almost surely, 211372820421 is an apocalyptic number.

It is an amenable number.

11372820421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11372820421 is an equidigital number, since it uses as much as digits as its factorization.

11372820421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 11372820421 in words is "eleven billion, three hundred seventy-two million, eight hundred twenty thousand, four hundred twenty-one".