101520620431545 has 32 divisors (see below), whose sum is σ = 185638283152128. Its totient is φ = 46409282178048.

The previous prime is 101520620431543. The next prime is 101520620431547. The reversal of 101520620431545 is 545134026025101.

It is an interprime number because it is at equal distance from previous prime (101520620431543) and next prime (101520620431547).

It is not a de Polignac number, because 101520620431545 - 2¹ = 101520620431543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101520620431543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37132717 + ... + 39772853.

It is an arithmetic number, because the mean of its divisors is an integer number (5801196348504).

Almost surely, 2^{101520620431545} is an apocalyptic number.

101520620431545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101520620431545 is a deficient number, since it is larger than the sum of its proper divisors (84117662720583).

101520620431545 is a wasteful number, since it uses less digits than its factorization.

101520620431545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006369.

The product of its (nonzero) digits is 144000, while the sum is 39.

Adding to 101520620431545 its reverse (545134026025101), we get a palindrome (646654646456646).

The spelling of 101520620431545 in words is "one hundred one trillion, five hundred twenty billion, six hundred twenty million, four hundred thirty-one thousand, five hundred forty-five".