21401011511320 has 64 divisors (see below), whose sum is σ = 56373396206400. Its totient is φ = 7158526494720.

The previous prime is 21401011511251. The next prime is 21401011511387. The reversal of 21401011511320 is 2311511010412.

It is a junction number, because it is equal to n+sod(n) for n = 21401011511291 and 21401011511300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 932088325 + ... + 932111284.

It is an arithmetic number, because the mean of its divisors is an integer number (880834315725).

Almost surely, 2^{21401011511320} is an apocalyptic number.

21401011511320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21401011511320 is an abundant number, since it is smaller than the sum of its proper divisors (34972384695080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21401011511320 is a wasteful number, since it uses less digits than its factorization.

21401011511320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864199668 (or 1864199664 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 21401011511320 its reverse (2311511010412), we get a palindrome (23712522521732).

The spelling of 21401011511320 in words is "twenty-one trillion, four hundred one billion, eleven million, five hundred eleven thousand, three hundred twenty".